System, method and smart card for realizing contactless communication based on gpio interface
A non-contact, communication system technology, applied in the field of non-contact communication, can solve the problems of unsightly appearance, small size, incapable of chip layout with large enough antenna, etc., achieve the effect of firm and stable structure, and increase optional types
Active Publication Date: 2017-10-27
WUHAN TIANYU INFORMATION IND
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the chip on the SIM card and the main board of the mobile phone is much smaller than the conventional bus card, bank card, etc., and it is impossible to arrange a large enough antenna on the chip on the SIM card and the main board of the mobile phone to support the contactless function. It is to connect a large software antenna on the card, but this method has problems such as the software antenna is easy to break, takes up equipment space, and is not beautiful, and requires the chip to support a non-contact communication interface
However, because the GPIO interface is widely used, many chips support this interface instead of contactless communication interface.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] see figure 1 As shown, the embodiment of the present invention provides a contactless communication system based on a GPIO interface, including a PCD (Proximity Coupling Device, proximity coupling device) and a smart card based on a GPIO interface for contactless communication, the smart card interacts with the PCD, and the interactive The data includes a number of logic 1s and a number of logic 0s. The smart card includes a DCLB (Digital Contactless Bridge, digital non-contact bridge) interface, a square wave processing module and an MCU (Micro Control Unit, micro control unit) with a GPIO interface. The MCU includes 4 A general-purpose input and output GPIO pin: GPIO_0 pin, GPIO_1 pin, GPIO_2 pin and GPIO_3 pin, DCLB interface includes DCLB_IO (digital contactless bridge-input and output) pin and DCLB_CLK (digital contactless...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a system, method and smart card for realizing non-contact communication based on a GPIO interface, and relates to the field of non-contact communication. The method includes the following steps: PCD sends a carrier wave, and the DCLB_CLK pin of the DCLB interface outputs a square wave to the square wave Processing module, the DCLB_IO pin outputs a square wave to the GPIO_0 pin of the MCU; the MCU analyzes whether the data sent by the PCD is logic 1 or logic 0, and the square wave processing module generates a frequency-divided square wave; the MCU controls the 16-frequency square wave according to the data sent by the MCU. The wave is output to the DCLB_IO pin to perform load modulation on the carrier; PCD analyzes whether the data sent by the MCU is logic 1 or logic 0. The invention can realize non-contact communication on a smart card that does not support a non-contact communication interface, effectively increase the optional types of smart card chips, integrate the antenna into the smart card, and ensure that the appearance of the smart card is consistent with that of an ordinary card, and the structure of the smart card is more Strong and stable.
Description
technical field [0001] The present invention relates to the field of non-contact communication, especially financial IC (Integrated Circuit, integrated circuit) card or mobile payment industry, in particular to a kind of non-contact communication based on GPIO (General Purpose Input Output, general purpose input / output) interface System, method and smart card. Background technique [0002] Smart cards are used more and more widely, and the main uses are divided into four categories: identification, payment tools, encryption and decryption, and information transmission. Smart cards can be divided into contact and contactless cards in terms of communication methods. Contactless cards are widely used in many fields such as bus cards, bank cards, social security cards, and ID cards because they are convenient and fast to swipe. If the functions of different cards can be integrated on other devices, the number of cards to be carried will be reduced, which will bring convenience ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06K19/07H04B5/00
Inventor 严泽旭董逢华熊传光
Owner WUHAN TIANYU INFORMATION IND